(Source: sg.news.yahoo.com) A worker checks the fans on miners, at the cryptocurrency farming operation, Bitfarms, in Farnham, Quebec, Canada, February 2, 2018. Picture taken February 2, 2018. REUTERS/Christinne Muschi BEIJING (Reuters) – Police in the north China city of Tianjin confiscated 600 computers used to mine bitcoin cryptocurrency after the local power grid operator reported […]